Refracting telescope on a very simple equatorial mounting being used in a darkened room camera obscura in order to project the Suns image so that sunspots could be studied. From Rosa Ursina by Christoph Scheiner Bracciano, 1630. Engraving. Editorial Stock Photo - Afloimages
Refracting telescope on a very simple equatorial mounting being used in a darkened room (camera obscura) in order to project the Sun's image so that sunspots could be studied. From 'Rosa Ursina' by Christoph Scheiner (Bracciano, 1630). Engraving.